The inspector for our primary home didnt say anything about the ducts (he just looked throigh the attic opening with a flashlight).

When your daily tools are flea spray, bolt cutters, a flash light, a digital camera, a measuring wheel or tape measure, a respirator, and a change of clothes for when you sit on a urine stained couch.

They are not hurricane or storm proofed well they will develop leaks in the roof in a year as the UV rays break down the caulking that they use in a factory.

I will be taking a flashlight, gloves, drill, hammer, mask, and firearm.

I always bring a notepad for noting repairs, a flashlight, a camera or smartphone, and of course all the paperwork I'm going to need (e.g. contracts).

There's no visible evidence, aside from the 42 pound bag of cat litter.I did some research and found I can photograph urine stains if I illuminate them with a UV light. 

Any carpet cleaning company should have UV lighting systems that will show urine staid for photographic evidence.  

And the shingles probably last a little longer since the panels are blocking the UV.

v=gwf2Cmgj0NQYou can find uv light at Petsmart and similar stores.

There are pumps, filters and UV systems to keep going so keep that in mind.The location on the lake is also important.